What Explanation Can You Give for Why the Sodium-Potassium Pump

question 29

Multiple Choice

What explanation can you give for why the sodium-potassium pump does not run out of ions to move in or out of the cell?

• A)Leak channels are always open,allowing the passage of sodium ions (Na⁺)and potassium ions (K⁺)across the membrane.
• B)The cell continuously produces more ions to replace those moved by the pump,maintaining a constant supply.
• C)Many of the ions moved in or out then diffuse passively back through the membrane in the opposite direction.

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